Question

2 Three balls A, B and C are kept in a straight line. The
separation between A and C is 1 m, and B is placed
at the midpoint between them. The masses of A, B, C
are 100 g, 200 g and 300 g respectively. Find the net
gravitational force on (a) A, (b) B, and (c) C.
​

Answer 1

Let the automobile overtakes the truck after time  t

Let the automobile overtakes the truck after time  tInitial velocity of the truck     u=0m/s

Let the automobile overtakes the truck after time  tInitial velocity of the truck     u=0m/sDistance covered by the truck    d=60 m

Let the automobile overtakes the truck after time  tInitial velocity of the truck     u=0m/sDistance covered by the truck    d=60 mFor truck :       d=ut+21aTt2

Let the automobile overtakes the truck after time  tInitial velocity of the truck     u=0m/sDistance covered by the truck    d=60 mFor truck :       d=ut+21aTt2∴     60=0+21×2.5t2          ⟹t=48=6.93  s